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Now could there be some out there, I’d imagine there could though. It’d also plug in in place of the 6DJ8, but you’d need to see if the tube biases up in a usable range the transconductance of the 6DJ8 is about twice as high as the 6AQ8.

Collection of Guido Pedrali Noy I. There also not a frame grid tube, basically there the same as a 12at7, just pins. Collection of Michael Wenzel D. You reach this tube or valve page from a search after clicking the “tubes” tab or by clicking a tube on a radio model page. Collection of Giorgio Busletta I. It’s an interesting question!

They must run them hard or something, because you can always count on them being at least weak. If actual plate current is very low or Collection of Jacky Parmentier F. KeggerSep 22, Antique radios, Old Time Radios. Keg — Everything I’ve ever read speced the 6AQ8 as a frame grid tube, but of course, putting my hands on any of that information now would take a lot of searching.


Collection of Patrice Zeissloff F.

With such a large stash, I’m sure you will — but they will likely be the exception rather than the rule. But the wire is so fragile, that it must be built on a ladder frame for stability.

2 X Tesla ECC85 6aq8 B 6l12 Tubes NOS | eBay

Once you do that, you can plug in the 6AQ8. Collection of Ralf Meinke D.

Collection of Dennis Jaroschek D. The bigger problem you will likely have is not getting ecc5 to sound good in a circuit, but finding quiet ones. We will not do it. They are usually bad when rebuilding Fisher, etc It doesn’t HAVE to be smaller, but virtually always is to gain maximum performance.

ECC85 any good for audio?

2 X Tesla ECC85 6aq8 B719 6l12 Tubes NOS

Frame grid tubes were one of the last tubes to be developed. Except for heater wiring voltage is 6. By the time anyone could get around to making them quiet for audio work, tubes were gone, and development work was abandoned.

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Das ist als Anlage hier zu lesen.

The frame is adequate enough for stability with RF work, but the shifting on the ecv85 from heating, combined with the cathode formulation used that is not quite as stable, causes the tubes to generate more audio noise. Die Schaltungstechnik der Vorstufe und deren verschiedenen Schaltungen.

Collection of Christian Schaufelberger CH. Browse Related Browse Related. Nothing of audio applies at those frequencies, and nothing of RF applies at audio frequencies.

Collection of Peter Olasz H. Lots of makers used them in FM sections, so they are definitely valuable. Front end RF tubes operate at high current levels ec85 that which they operate at in audio circuits, which is why they wear out so fast in tuner sections.

And have not had noise issues, I Much prefer these over 12AT7’s in audio. Your name or email address: Exact equivalent to 6AQ8. This tester was prepared by Mr.

Collection of Werner Wussow D. We mainly use the Hi Skip to main content. Both tubes have a top Dimple Disc Getter. Collection of Oskar Elm D.